The campaign of President Barack Obama and Ohio Democrats sued the state over changes in Ohio law that took away the three days of voting for most people, but made exceptions for military personnel and Ohioans living overseas. Democrats say nearly 100,000 people voted in the three days before the election in 2008.

A federal appeals court ruling reinstated voting on the weekend before the election and Ohio Secretary of State Jon Husted, a Republican, appealed that ruling to the Supreme Court.